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| author | Einar Lueck <elelueck@de.ibm.com> | 2011-11-15 03:31:16 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-11-16 23:28:20 +0100 |
| commit | 0284a0fdf3def1beb4de509f87472520b23883c9 (patch) | |
| tree | 012a6a380508f4b0214746d147bbc1aba6e32a51 /drivers/s390 | |
| parent | qeth: l3 fix rcu splat in xmit (diff) | |
| download | linux-0284a0fdf3def1beb4de509f87472520b23883c9.tar.xz linux-0284a0fdf3def1beb4de509f87472520b23883c9.zip | |
qeth: Reduce CPU consumption through less SIGA-r calls
Patch avoids SIGA-r calls in case of SIGA-r required. It only calls
SIGA-r if a threshold of free buffer is reached. CPU consumption is
reduced as a consequence.
Signed-off-by: Einar Lueck <elelueck@de.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/net/qeth_core.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h index b77c65ed1381..4abc79d3963f 100644 --- a/drivers/s390/net/qeth_core.h +++ b/drivers/s390/net/qeth_core.h @@ -236,8 +236,7 @@ static inline int qeth_is_ipa_enabled(struct qeth_ipa_info *ipa, #define QETH_IN_BUF_COUNT_MAX 128 #define QETH_MAX_BUFFER_ELEMENTS(card) ((card)->qdio.in_buf_size >> 12) #define QETH_IN_BUF_REQUEUE_THRESHOLD(card) \ - ((card)->ssqd.qdioac1 & AC1_SIGA_INPUT_NEEDED ? 1 : \ - ((card)->qdio.in_buf_pool.buf_count / 2)) + ((card)->qdio.in_buf_pool.buf_count / 2) /* buffers we have to be behind before we get a PCI */ #define QETH_PCI_THRESHOLD_A(card) ((card)->qdio.in_buf_pool.buf_count+1) |